Jabotinsky did not recognize Palestinians as their own people.. He meant the Arabs in general. Since Israel needs Judea and Samaria for its defense , giving them up means damaging the Iron Wall. Jabotinsky also said to never underestimate the power of a right, and that we should never give up our legitimate rights to settle on both banks of the Jordan. Beinart needs to understand that peace can only happen if the Arabs sue for peace and surrender unconditionally. That is Jabotinsky. What Beinart describes is appeasement.
from the article: What Liberal Zionists should say when we’re called naive